“…Later, the choice of referential expressions starts to be governed by coherence constraints that apply to the discourse as a whole (its causal and temporal structure). At this point, referential expressions are less rigidly constrained (Hickmann, 1995;Hickmann, Kail, & Roland, 1995;Karmiloff-Smith, 1985;Orsolini, Rossi, & Pontecorvo, 1996;Ricard & Snow, 1990;Roth, Spekman, & Fye, 1995;Sauvaire & Vion, 1989;Vion & Colas, 1998;Vonk, Hustinx, & Simons, 1992). During adulthood, ambiguous references reappear and increase with age: new referents are often treated as givens when they have not yet been introduced, and anaphoric narration devices (whose role is to mark coreference) may not point unambiguously to a single antecedent (Light, Capps, Singh, & AlbertonOwens, 1994).…”